I couldn't figure out the problem as only few members getting this problem regularly and most of the members are able to submit the articles. You can see number of articles posted each day.
Since it is working for most of the members including me, it must be a problem with the browser settings. I am using Firefox 3.5 and is working perfectly fine.
I found this problem when the page does not load completely and clicks on save button. The other problem could be JavaScript is disabled.
When opportunity is in front of you, don't hesitate to catch it. It will never come to you again. - Maverick
